CN105605285A - Quick partially rotary electric actuating mechanism for ships - Google Patents
Quick partially rotary electric actuating mechanism for ships Download PDFInfo
- Publication number
- CN105605285A CN105605285A CN201610133286.XA CN201610133286A CN105605285A CN 105605285 A CN105605285 A CN 105605285A CN 201610133286 A CN201610133286 A CN 201610133286A CN 105605285 A CN105605285 A CN 105605285A
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- CN
- China
- Prior art keywords
- gear
- manual
- shaft
- quick
- worm
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/05—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
Abstract
The invention provides a quick partially rotary electric actuating mechanism for ships. The quick partially rotary electric actuating mechanism comprises a tank, a manual worm gear, a manual worm, a manual gear, a manual gear axle and a hand wheel. The tank comprises an upper shell and a lower shell, and an electric worm and worm gear assembly, a few-tooth-difference planetary gear, an internal tooth output shaft and an output shaft sleeve are sequentially arranged inside the tank from top to bottom; the manual worm gear is arranged on an upper outer ring of the few-tooth-difference planetary gear, the manual worm is connected with the manual worm gear and the manual gear respectively, the manual gear is meshed with the manual gear axle, and the manual gear axle is connected with the hand wheel. The quick partially rotary electric actuating mechanism for the ships has the advantages that the quick partially rotary electric actuating mechanism is compact in structure and convenient to operate, and high torque can be outputted by the quick partially rotary electric actuating mechanism; the quick partially rotary electric actuating mechanism can act quickly and is high in reliability, and accordingly the safety and the stability can be guaranteed.
Description
Technical field
The present invention relates to electric operator, relate in particular to the Quick-type part revolution warship marine electric executing agency of adjustable output angle stroke.
Background technology
In recent years, along with improving constantly of naval vessel up-to-dateness, China voluntarily research and design many Novel marine valves, as the kingston valve that naval vessel is used, these novel valves have adopted new construction, new material, new technology. But the description of the electric device matching with marine valve is still incomplete, also selecting external product with the electric device that this class valve matches. On some special naval vessel, due to space, heavily quantitative limitation, active demand is lightweight, size is little, the large electric operator of output torque. Simultaneously under accident conditions, can be in the short time valve-off, ensure warship safety, stable operation.
In order further to ensure the quality of electric operator, promote the electric valve executing mechanism production domesticization of warship marine valve and naval vessel and autonomy-oriented process, specialized designs has been developed the Quick-type part revolution warship marine electric executing agency of adjustable output angle stroke, solves the supporting needs of corollary new kingston valve.
Summary of the invention
The present invention is directed to above problem, a kind of compact conformation is provided, handled easily, the Quick-type part revolution warship marine electric executing agency that output torque is large.
Technical scheme of the present invention is: comprise the casing being formed by upper shell and lower house, the inside of described casing is provided with electronic worm and wormwheel assembly, small teeth number difference planet gear, internal tooth output shaft and output sleeve from top to bottom successively, described electronic worm and gear assembly comprises motor, electronic worm screw and electronic worm gear, described motor drives electronic worm screw, described electronic worm screw is connected with electronic worm gear, the endoporus of described electronic worm gear connects eccentric power shaft, the bottom of described eccentric power shaft connects small teeth number difference planet gear
Described internal tooth output shaft has through hole, described through hole comprises the top shoulder hole, mesopore and the bottom circular groove that are communicated with successively, the top shoulder hole of described internal tooth output shaft connects the bottom outer shroud of described small teeth number difference planet gear, and described output sleeve passes successively bottom circular groove and the mesopore of described internal tooth output shaft and stretches in the shoulder hole of top;
The bottom surface of described internal tooth output shaft is provided with arc-shaped limit piece, make the curved groove of bottom surface one side of internal tooth output shaft, the side of described lower house is threaded connection the adjustment bolt that is provided with a pair of symmetry, and a pair of adjustment bolt lays respectively in described deep-slotted chip breaker and for contacting described arc-shaped limit piece;
Also comprise manual worm gear, manual worm, manual gear, manual gear axle and handwheel, described manual worm gear is located at the top outer shroud of described small teeth number difference planet gear, described manual worm connects described manual worm gear, described manual worm is connected with manual gear, described manual gear engages with manual gear axle, and described manual gear axle is connected with handwheel.
Also comprise force moment protection mechanism, described force moment protection mechanism is located at the top of described upper shell, and described force moment protection mechanism comprises crank throw, crank shaft, base plate, microswitch one and cam bit,
Described crank throw is " 7 " font, and one end of crank throw is positioned at the helicla flute of electronic worm screw, and the other end is located on described crank shaft, and described crank shaft connects cam bit through base plate, and described base plate is connected with upper shell by two joint pins; Described cam bit is used for contacting described microswitch one, and described microswitch one is for cutting off motor power.
Described eccentric power shaft has centre bore, in described centre bore, is provided with stroke shaft, and described eccentric power shaft is stretched out on the top of described stroke shaft, bottom connects output sleeve;
Also comprise range controlling mechanism, described range controlling mechanism is located at the top of upper shell and comprises cam, microswitch two, pressing plate and base, described cam is located at the top of described stroke shaft, described cam is used for contacting described microswitch two, described microswitch two is for cutting off motor power, described microswitch two is located between described pressing plate and base, and described pressing plate is positioned at the top of base, and described base is located at the end face of described upper shell.
Also comprise mechanical location indicating mechanism, described mechanical location indicating mechanism is located at the top of described range controlling mechanism, described mechanical location indicating mechanism comprises thread spindle, aperture lower plate, aperture upper plate and pointer, described thread spindle connects described stroke shaft, described aperture lower plate and aperture upper plate are connected on described thread spindle, described aperture lower plate is provided with angular travel scale, and described aperture upper plate is positioned at the top of aperture lower plate, and described pointer is located on described pressing plate.
The bottom of described internal tooth output shaft is arranged with a pair of caulking groove, and described caulking groove is communicated with described bottom circular groove, and the both sides of described output sleeve are provided with abaculus, and described abaculus is located in described caulking groove adaptedly.
The bottom of described lower house is provided with output terminal pad, and described output sleeve is positioned at described output terminal pad.
Electric operator of the present invention at work, is divided into electronic control and manually controls handled easily.
Electronic control is: adopt worm and gear-planetary gear double reduction drive mechanism, primary speed-down is electronic worm screw and electronic worm gear, and double reduction is small teeth number difference planet gear. Because manual worm is irreversible worm, therefore in the time of electric operating, manual worm gear can not rotate, thereby while realizing electric operating, manual worm can not rotate, handwheel can not rotate. While adopting double reduction to realize electric operating, output torque is large, the angular travel time is short.
Manually control and be: adopt three grades of reducing transmission structures of spur gear-worm and gear-planetary gear, primary speed-down is the engagement of manual gear axle and manual gear, and double reduction is manual worm and manual worm gear, and three grades of decelerations are small teeth number difference planet gear. In the time of manual operation, electronic worm gear and eccentric power shaft do not rotate, and therefore, electronic worm screw can not be rotated, thereby can not disturb electric operating while realizing manual operation. Adopt three grades of decelerations can realize the less power of use and rotate handwheel, operation easily.
Arc-shaped limit piece is set on internal gear output shaft; in the time that electric operator exceeds output angle stroke; arc-shaped limit piece touches adjustment bolt; feed back to force moment protection mechanism by the transmission of power; force moment protection mechanism action; cut off motor power, executing agency stops action, realizes the defencive function of electric operator to valve.
Stroke shaft and electric operator output angle travel synchronization rotate, and cam is synchronizeed and rotated with stroke shaft by holding screw, presses the microswitch two in range controlling mechanism by cam, causes cutting off motor power, and electric operator stops action. Because cam can regulate and the angular distance of microswitch two by holding screw, and cam synchronizes with stroke shaft and rotates, thereby realizes the adjustable function of output angle stroke of executing agency.
The present invention can quick acting, reliability is high, has ensured safety and stability.
Brief description of the drawings
Fig. 1 is structural representation of the present invention,
Fig. 2 is the top view of Fig. 1,
Fig. 3 is fundamental diagram of the present invention,
Fig. 4 is the structural representation of internal tooth output shaft in the present invention,
Fig. 5 is the three-dimensional structure diagram of Fig. 4,
Fig. 6 is the structural representation of force moment protection mechanism in the present invention,
Fig. 7 is the top view of Fig. 6,
Fig. 8 is the working state figure of Fig. 6,
Fig. 9 is the structural representation of range controlling mechanism in the present invention,
Figure 10 is the structural representation of mechanical location indicating mechanism in the present invention,
Figure 11 is the top view of Figure 10;
In figure, 1 is output terminal pad, the 2nd, and lower house, the 3rd, output sleeve, the 4th, internal tooth output shaft, the 41st, mesopore, the 42nd, bottom circular groove, the 43rd, arc-shaped limit piece, the 44th, deep-slotted chip breaker, the 45th, caulking groove,
The 5th, small teeth number difference planet gear, the 6th, manual worm gear, the 7th, upper shell, the 8th, stroke shaft, the 9th, electronic worm gear, the 10th, electronic worm screw, the 100th, helicla flute, the 11st, eccentric power shaft, the 110th, centre bore,
The 12nd, cam, the 13rd, range controlling mechanism, the 14th, force moment protection mechanism, the 15th, mechanical location indicating mechanism; the 16th, cover cap, the 17th, adjust bolt, the 18th, manual worm, the 19th, motor; the 20th, manual gear, the 21st, manual gear axle, the 22nd, handwheel, the 23rd, crank throw; the 24th, crank shaft, the 25th, base plate, the 26th, microswitch one, 27th, cam bit; the 28th, microswitch two, 29th, pressing plate, the 30th, base, the 31st, thread spindle; the 32nd, aperture lower plate, the 33rd, aperture upper plate, the 34th, pointer, the 35th, joint pin.
Detailed description of the invention
The present invention is as shown in Fig. 1-11, comprise the casing being formed by upper shell 7 and lower house 2, the inside of described casing is provided with electronic worm and wormwheel assembly, small teeth number difference planet gear 5, internal tooth output shaft 4 and output sleeve 3 from top to bottom successively, described electronic worm and gear assembly comprises motor 19, electronic worm screw 10 and electronic worm gear 9, described motor 19 drives electronic worm screw 10, described electronic worm screw 10 is connected with electronic worm gear 9, the endoporus of described electronic worm gear connects eccentric power shaft 11, the bottom of described eccentric power shaft connects small teeth number difference planet gear 5
Described internal tooth output shaft 4 has through hole, described through hole comprises the top shoulder hole 41, mesopore 42 and the bottom circular groove 43 that are communicated with successively, the top shoulder hole of described internal tooth output shaft 4 connects the bottom outer shroud of described small teeth number difference planet gear 5, and described output sleeve 3 passes successively bottom circular groove and the mesopore of described internal tooth output shaft and stretches in the shoulder hole of top;
The bottom surface of described internal tooth output shaft 4 is provided with arc-shaped limit piece 43, make the curved groove 44 of bottom surface one side of internal tooth output shaft, the side of described lower house is threaded connection the adjustment bolt 17 that is provided with a pair of symmetry, and a pair of adjustment bolt lays respectively in described deep-slotted chip breaker and for contacting described arc-shaped limit piece;
Also comprise manual worm gear 6, manual worm 18, manual gear 20, manual gear axle 21 and handwheel 22, described manual worm gear 6 is located at the top outer shroud of described small teeth number difference planet gear 5, described manual worm 18 connects described manual worm gear 6, described manual worm 18 is connected with manual gear 20, described manual gear 20 engages with manual gear axle 21, and described manual gear axle 21 is connected with handwheel 22.
The electronic control of the present invention adopts worm and gear-planetary gear double reduction drive mechanism, completed the primary speed-down of executing agency by the engagement of electronic worm screw and electronic worm gear, then by eccentric power shaft 11, moment of torsion is passed to small teeth number difference planet gear and complete secondary speed-reducing, last small teeth number difference planet gear drives internal tooth output shaft, and internal tooth output shaft drives output sleeve action;
Manually control and adopt three grades of reducing transmission structures of spur gear-worm and gear-planetary gear, it is completed the primary speed-down of executing agency by the engagement of spur gear, then manual worm and manual worm gear are double reduction, finally complete three decelerations by small teeth number difference planet gear, last small teeth number difference planet gear drives internal tooth output shaft, and internal tooth output shaft drives output sleeve action;
Electric operator, in the time of electric operating, can be realized larger gearratio output, opens soon function thereby realize electric operator quick closing valve.
As shown in Fig. 6-8, also comprise force moment protection mechanism 14, described force moment protection mechanism is located at the top of described upper shell 7, and described force moment protection mechanism comprises crank throw 23, crank shaft 24, base plate 25, microswitch 1 and cam bit 27,
Described crank throw is " 7 " font, and one end of crank throw 23 is positioned at the helicla flute 100 of electronic worm screw 10, and the other end is located on described crank shaft 24, and described crank shaft connects cam bit through base plate, and described base plate is connected with upper shell by two joint pins 35; Described cam bit is used for contacting described microswitch one, and described microswitch one is for cutting off motor power.
Force moment protection mechanism is stuck in by crank throw in the helicla flute of worm screw, by the rotation of electronic worm screw, crank throw is moved axially; Torque is converted into displacement stroke by electronic worm screw 10, and crank throw 23 drives crank shaft 24 to rotate, thus rotating cam sheet 27, the rotation of cam bit 27 makes cam bit press microswitch 1, causes cutting off motor power, and electric operator stops action.
Force moment protection mechanism can be used to control the stop position of electric operator in operated valve process; be that electric operator is in operating process; in the time that operation torque reaches setting; start action; electric contact is disconnected, thereby cut off the electricity supply, electric operator is quit work; as for the forced seal such as stop valve and gate valve formula valve, accurately to control its closed position.
Described eccentric power shaft 11 has centre bore 110, is provided with stroke shaft 8 in described centre bore, and described eccentric power shaft is stretched out on the top of described stroke shaft, bottom connects output sleeve;
As shown in Figure 9, also comprise range controlling mechanism 13, described range controlling mechanism is located at the top of upper shell and comprises cam 12, microswitch 2 28, pressing plate 29 and base 30, described cam 12 is located at the top of described stroke shaft 8, described cam 12 is for contacting described microswitch 2 28, described microswitch two is for cutting off motor power, described microswitch two is located between described pressing plate 29 and base 30, described pressing plate is positioned at the top of base, and described base is located at the end face of described upper shell.
Because stroke shaft 8 and electric operator output angle travel synchronization rotate, cam 12 is synchronizeed rotation with stroke shaft 8, press the microswitch 2 28 in range controlling mechanism 13 by cam, causes cutting off motor power, and electric operator stops moving.
Range controlling mechanism can be used to control the opening and closing position of electric operator in operated valve process, be that electric operator is in operating process, in the time that delivery stroke reaches assigned position, range controlling mechanism action, electric contact is disconnected, thereby cut off the electricity supply, electric operator is quit work, accurately to control its opening and closing position.
As shown in Figure 10-11, also comprise mechanical location indicating mechanism 15, described mechanical location indicating mechanism is located at the top of described range controlling mechanism, described mechanical location indicating mechanism comprises thread spindle 31, aperture lower plate 32, aperture upper plate 33 and pointer 34, described thread spindle 31 connects described stroke shaft 8, described aperture lower plate 32 and aperture upper plate 33 are connected on described thread spindle, described aperture lower plate is provided with angular travel scale, described aperture upper plate is positioned at the top of aperture lower plate, and described pointer is located on described pressing plate 29.
Mechanical location indicating mechanism 15 is arranged on stroke shaft 8, stroke shaft 8 connects with output sleeve 3 and synchronizes rotation, in aperture lower plate 32, be provided with angular travel scale, in the time that output sleeve 3 rotates corresponding angular travel, output sleeve 3 drives stroke shaft 8 to rotate, stroke shaft 8 drives thread spindle 31 to rotate, thus the real-time reaction electric operator output angle stroke of mechanical location indicating mechanism.
In work, cover cap 16 is set in mechanical location indicating mechanism and force moment protection mechanism and establishes for cover, cover cap is connected on upper shell.
The bottom of described internal tooth output shaft is arranged with a pair of caulking groove 45, it is that caulking groove is positioned on the circumference of bottom circular groove that described caulking groove 45 is communicated with described bottom circular groove 42(), the both sides of described output sleeve are provided with abaculus, described abaculus is located in described caulking groove adaptedly, output sleeve and internal tooth output shaft are reliably located, realize synchronization action.
The bottom of described lower house is provided with output terminal pad 1, and described output sleeve 3 is positioned at described output terminal pad 1. Output terminal pad is set, makes to export terminal pad and deep-slotted chip breaker and form arc cavity, be convenient to adjust bolt and reliably place.
Claims (6)
1. a Quick-type part revolution warship marine electric executing agency, comprise the casing being formed by upper shell and lower house, it is characterized in that, the inside of described casing is provided with electronic worm and wormwheel assembly, small teeth number difference planet gear, internal tooth output shaft and output sleeve from top to bottom successively, described electronic worm and gear assembly comprises motor, electronic worm screw and electronic worm gear, described motor drives electronic worm screw, described electronic worm screw is connected with electronic worm gear, the endoporus of described electronic worm gear connects eccentric power shaft, the bottom of described eccentric power shaft connects small teeth number difference planet gear
Described internal tooth output shaft has through hole, described through hole comprises the top shoulder hole, mesopore and the bottom circular groove that are communicated with successively, the top shoulder hole of described internal tooth output shaft connects the bottom outer shroud of described small teeth number difference planet gear, and described output sleeve passes successively bottom circular groove and the mesopore of described internal tooth output shaft and stretches in the shoulder hole of top;
The bottom surface of described internal tooth output shaft is provided with arc-shaped limit piece, make the curved groove of bottom surface one side of internal tooth output shaft, the side of described lower house is threaded connection the adjustment bolt that is provided with a pair of symmetry, and a pair of adjustment bolt lays respectively in described deep-slotted chip breaker and for contacting described arc-shaped limit piece;
Also comprise manual worm gear, manual worm, manual gear, manual gear axle and handwheel, described manual worm gear is located at the top outer shroud of described small teeth number difference planet gear, described manual worm connects described manual worm gear, described manual worm is connected with manual gear, described manual gear engages with manual gear axle, and described manual gear axle is connected with handwheel.
2. a kind of Quick-type part according to claim 1 is turned round warship marine electric executing agency; it is characterized in that; also comprise force moment protection mechanism; described force moment protection mechanism is located at the top of described upper shell; described force moment protection mechanism comprises crank throw, crank shaft, base plate, microswitch one and cam bit
Described crank throw is " 7 " font, and one end of crank throw is positioned at the helicla flute of electronic worm screw, and the other end is located on described crank shaft, and described crank shaft connects cam bit through base plate, and described base plate is connected with upper shell by two joint pins; Described cam bit is used for contacting described microswitch one, and described microswitch one is for cutting off motor power.
3. a kind of Quick-type part according to claim 1 and 2 is turned round warship marine electric executing agency, it is characterized in that, described eccentric power shaft has centre bore, in described centre bore, is provided with stroke shaft, and described eccentric power shaft is stretched out on the top of described stroke shaft, bottom connects output sleeve;
Also comprise range controlling mechanism, described range controlling mechanism is located at the top of upper shell and comprises cam, microswitch two, pressing plate and base, described cam is located at the top of described stroke shaft, described cam is used for contacting described microswitch two, described microswitch two is for cutting off motor power, described microswitch two is located between described pressing plate and base, and described pressing plate is positioned at the top of base, and described base is located at the end face of described upper shell.
4. a kind of Quick-type part according to claim 3 is turned round warship marine electric executing agency, it is characterized in that, also comprise mechanical location indicating mechanism, described mechanical location indicating mechanism is located at the top of described range controlling mechanism, described mechanical location indicating mechanism comprises thread spindle, aperture lower plate, aperture upper plate and pointer, described thread spindle connects described stroke shaft, described aperture lower plate and aperture upper plate are connected on described thread spindle, described aperture lower plate is provided with angular travel scale, described aperture upper plate is positioned at the top of aperture lower plate, described pointer is located on described pressing plate.
5. a kind of Quick-type part according to claim 1 is turned round warship marine electric executing agency, it is characterized in that, the bottom of described internal tooth output shaft is arranged with a pair of caulking groove, described caulking groove is communicated with described bottom circular groove, the both sides of described output sleeve are provided with abaculus, and described abaculus is located in described caulking groove adaptedly.
6. a kind of Quick-type part according to claim 1 is turned round warship marine electric executing agency, it is characterized in that, the bottom of described lower house is provided with output terminal pad, and described output sleeve is positioned at described output terminal pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133286.XA CN105605285B (en) | 2016-03-09 | 2016-03-09 | A kind of Quick-type part revolution warship marine electric executing agency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610133286.XA CN105605285B (en) | 2016-03-09 | 2016-03-09 | A kind of Quick-type part revolution warship marine electric executing agency |
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| CN105605285A true CN105605285A (en) | 2016-05-25 |
| CN105605285B CN105605285B (en) | 2018-07-20 |
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| CN201610133286.XA Active CN105605285B (en) | 2016-03-09 | 2016-03-09 | A kind of Quick-type part revolution warship marine electric executing agency |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764032A (en) * | 2017-01-12 | 2017-05-31 | 温州力米托克智能科技有限公司 | A kind of electric device for valve with moment of torsion inductor |
| CN107178646A (en) * | 2017-06-09 | 2017-09-19 | 东台友铭船舶配件有限公司 | With the ship assembling fire-fighting sluice valve for being precisely controlled structure |
| WO2021056649A1 (en) * | 2019-09-24 | 2021-04-01 | 浙江澳翔自控科技有限公司 | Small electric actuator |
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| US20110049407A1 (en) * | 2006-09-07 | 2011-03-03 | Park Soon-Won | Valve Actuator Having Spring Return Power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106764032A (en) * | 2017-01-12 | 2017-05-31 | 温州力米托克智能科技有限公司 | A kind of electric device for valve with moment of torsion inductor |
| CN107178646A (en) * | 2017-06-09 | 2017-09-19 | 东台友铭船舶配件有限公司 | With the ship assembling fire-fighting sluice valve for being precisely controlled structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105605285B (en) | 2018-07-20 |
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Inventor after: Cai Jun Inventor after: Guo Qing Inventor after: Xu Wencai Inventor after: Qiu Wen Inventor after: Zhu Zheng Inventor after: Yin Guangyao Inventor after: Qian Rong Inventor after: Wang Zhaolei Inventor before: Cai Jun Inventor before: Guo Qing Inventor before: Xu Wencai Inventor before: Qiu Wen Inventor before: Zhu Zheng Inventor before: Yin Guangyao Inventor before: Qian Rong Inventor before: Wang Zhaolei Inventor before: Hu Shipeng |
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